Description
Kyoritsu KEW 3123A High Voltage Insulation Tester
The Kyoritsu KEW 3123A is a rugged, battery-powered high-voltage insulation tester engineered for demanding field use. Encased in a drip-proof hard shell, it delivers dual DC test voltages of 5 000 V and 10 000 V to assess insulation resistance up to 200 GΩ at 5 kV and 400 GΩ at 10 kV, automatically switching between low and high ranges. A clear analogue needle movement is paired with colour-coded scales and matching LEDs, enabling instant visual confirmation of whether readings fall within the selected range. An audible buzzer warns of live high voltage during measurement.
The “Press to Test” trigger can be locked for continuous testing, and a guard terminal allows exclusion of surface leakage currents when examining cable insulation. Powered by eight AA cells, the KEW 3123A offers approximately six hours of uninterrupted operation under maximum load. Its ergonomic design measuring 200 × 140 × 80 mm and weighing about 1 kg including batteries ensures comfortable one-handed use.
Compliant with IEC safety standards and equipped with overload and withstand protections, this instrument is ideal for insulation testing of industrial installations, cables, transformers, generators and switchgear in harsh environments.
Features:
- Battery-powered insulation testing up to 200 GΩ at 5 kV and 400 GΩ at 10 kV.
- Automatic dual-range measurement with colour-coded scales and matching LEDs.
- Analogue needle display for rapid, intuitive readings.
- Audible high-voltage warning during tests.
- Lockable “Press to Test” trigger for continuous measurement.
- Guard terminal to eliminate surface leakage currents in cable tests.
- Drip-proof hard carrying case (IP41).
- Low power consumption: ~6 hours continuous operation on eight AA cells.
Specifications:
| Parameter | KEW 3123A |
|---|---|
| Test Voltages: | DC 5 000 V / 10 000 V ± 5 % |
| Measuring Ranges (auto-ranging): | 0 – 200 GΩ / 0 – 400 GΩ |
| Accuracy (at 23 °C ± 5 °C): | ± 5 % rdg (0.2 – 100 GΩ); ± 10 % rdg or 0.5 % scale (other ranges) |
| Output Current (Open Circuit): | 70 mA |
| Overload Protection: | AC 720 V / 10 s |
| Withstand Voltage: | AC 5 000 V for 1 min between circuit & case |
| Insulation Resistance (circuit-to-case): | ≥ 1 000 MΩ / DC 1 000 V |
| Operating Temperature & Humidity: | –10 °C to +40 °C, ≤ 85 % RH (no condensation) |
| Storage Temperature & Humidity: | –20 °C to +60 °C, ≤ 90 % RH (no condensation) |
| Dimensions (W × H × D): | 200 × 140 × 80 mm |
| Weight (incl. batteries): | 1 kg |
| Power Supply: | 8 × AA (R6P) cells |
| Battery Life: | 6 hours (maximum load) |
Applications:
- Heavy-duty electrical maintenance.
- Industrial installation insulation testing.
- Cable insulation diagnostics.
- Transformer insulation verification.
- Generator insulation checks.
- Switchgear insulation assessment.
Package Contents:
- 1x Hard carrying case (M-9158)
- 1x Line probe (M-7165A)
- 1x Earth cord (M-7224A)
- 1x Guard cord (M-7225A)
- 1x Hook-type prod (M-8019)
- 8x AA batteries (R6P)
- 1x Instruction manual
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